Question

what fo u understand by Refractive Index...

Answer 1

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.

Answer 2

hey friend,
here's your answer,

Refractive index is the ratio of sin of the angle of incidence to the sin of the angle of refraction i.e,
R.F =sin i/ sin r

hope it helps you.....!